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Let f(x)=(x+2)21 with domain x2, and define g(x)=f(x5)+3.

  1. State the range of f.

  2. State a suitable domain for g and give its range.

  3. Find expressions for

    f1(x) and g1(x)

    and sketch these two functions.


Sketch y=f(x) to find its range.


Translate y=f(x) to get a sketch of y=g(x) - look at the x axis to find the domain and the y axis to find the range.


Take a look at the tutorial for inverse functions in this chapter if you're finding the last part tricky!